# NTSB OAK73FVD14: Hiller Acft UH-12C, N9734C, Brentwood, CA, September 12, 1972

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: September 12, 1972
- Place: Brentwood, CA · BRENTWOOD, CA
- Location: 37.9356° N, 121.7190° W: Placed by OpenAirDocs: center of Brentwood, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9356&lon=-121.7190&mi=10
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report March 31, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 168169
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK73FVD14
- Page: https://openairdocs.org/ntsb/OAK73FVD14

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3791  72/9/12    BRENTWOOD,CALIF     HILLER ACFT UH-12C  CR-  1  0  0  COMMERCIAL                COMMERCIAL, AGE 60,
        TIME - 0745                    N9734C              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   UNK/NR TOTAL HOURS, 1900
                                       DAMAGE-MINOR        OT-  0  0  0                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BRENTWOOD,CALIF             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR ACCIDENT TO PERSON                       STATIC: IDLING ROTORS
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - OPERATED CARELESSLY
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - LETTUCE                                   TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          GLOVES - NOT USED                                        GOGGLES - NOT USED
          CRASH HELMET - AVAILABLE-NOT USED                        COCKPIT CRASHPAD - NOT INSTALLED
          CRASH BAR - NOT INSTALLED                                TANK/HOPPER-LOCATION - SIDES
        REMARKS- PLT DEPLANED AND WALKED INTO ROTATING T/R. CHOLINESTERASE CK NOT PERFORMED.
```

## Aircraft

- Registration: [N9734C](https://openairdocs.org/aircraft/N9734C), registered now, S/N 840, built 1956 (OpenAirDocs)
- Reported make and model: HILLER ACFT UH-12C
- Registry model: [Hiller UH-12C](https://openairdocs.org/model/hiller-uh-12c) (registry code 4360116) (OpenAirDocs)
- Registry engine: [Franklin 6V 350 series](https://openairdocs.org/engine/franklin-6v-350-series) (registry code 27043, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Minor damage

## Other investigations on N9734C (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB OAK73FVM40](https://openairdocs.org/ntsb/OAK73FVM40), Jun 28, 1973: Hiller Acft UH-12C (N9734C), Salinas, CA, destroyed

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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